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Keefer Gravital Radical Airliner Project of 1931

hesham

CLEARANCE: Above Top Secret
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Hi,

Mr. Charles H. Keefer studies 15 years for his design,it had a ducted fan powered engines,
and it was an airliner with twin-boom and very small canard,with floats to land on the water,
called Gravital.

https://books.google.com.eg/books?id=BSZwdyVs8lYC&pg=PA32&dq=keefer+gravital+plane+magazine&hl=ar&sa=X&ved=0ahUKEwiMn6-oifrKAhVLAxoKHTptDOoQ6AEIHDAA#v=onepage&q=keefer%20gravital%20plane%20magazine&f=false
 

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steelpillow

So many projects, so little time...
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Wonderful! A real gem of insanity, the obsolete principle of the paddle steamer applied to aircraft lift. Offhand, I cannot imagine a less efficient way to generate powered lift.
 

hesham

CLEARANCE: Above Top Secret
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You are right my dear Dan,

and it was a very radical design.
 
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